i suggest you get an an arduino, some servos of various sizes, and a 6v power supply, and start experimenting. Also look at hvac dampers that are available to find inexpensive ones that might fit your needs, or get ideas for making your own.
i suggest you get an an arduino, some servos of various sizes, and a 6v power supply, and start experimenting. Also look at hvac dampers that are available to find inexpensive ones that might fit your needs, or get ideas for making your own.